Optical glass, preform for press molding and optical element

Details Optical glass, preform for press molding and optical element Optical glass, preform for press molding and optical element

2007-01-02

2007-01-02

Lorengo, J. A. (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S047000

Reexamination Certificate

active

10744096

ABSTRACT:
An optical glass being free of lead and fluorine, having a low glass transition temperature permitting press-molding with a mold formed of stainless steel and having high climate resistance includes an optical glass comprising, by mol %, 25 to 44% of P2O5, 10 to 40% of a total of Li2O, Na2O and K2O, 5 to 40% of ZnO, 1 to 35% of BaO and at least one components selected from Nb2O5, Bi2O3and WO3, having a glass transition temperature (Tg) of 370° C. or lower and being free of lead and fluorine and an optical glass which is free of lead and fluorine, has a mass loss ratio of less than 0.25% when immersed in pure water, and has a glass transition temperature (Tg) of 370° C. or lower.

REFERENCES:
patent: 5021366 (1991-06-01), Aitken
patent: 5153151 (1992-10-01), Aitken
patent: 5256604 (1993-10-01), Aitken
patent: 5668066 (1997-09-01), Oguma et al.
patent: 5711779 (1998-01-01), Havewala et al.
patent: 6127297 (2000-10-01), Hashimoto
patent: 6514891 (2003-02-01), Lee
patent: 6667258 (2003-12-01), Quinn
patent: 6743743 (2004-06-01), Sato
patent: 6784128 (2004-08-01), Otsuka et al.
patent: 2002/0042337 (2002-04-01), Zou et al.
patent: 2004/0087428 (2004-05-01), Otsuka et al.
patent: 2004/0092378 (2004-05-01), Wolff et al.
patent: 2004/0170700 (2004-09-01), Numaguchi et al.
patent: 2004/0259714 (2004-12-01), Fujiwara et al.
patent: 2005/0003948 (2005-01-01), Yamazaki
patent: 2005/0049132 (2005-03-01), Shiraishi
patent: 2005/0054511 (2005-03-01), Fujiwara et al.
patent: 2005/0192174 (2005-09-01), Yamamoto et al.
patent: 11-139845 (1999-05-01), None
patent: 2000-072474 (2000-03-01), None

Affiliated with

Also associated with

Rating

Optical glass, preform for press molding and optical element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical glass, preform for press molding and optical element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical glass, preform for press molding and optical element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3781555